That was a positive side effect of treatment, to be sure, as her body was finally absorbing her food properly, but one she wasn't anticipating. (health.com)
In this condition, your pet's intestines can not absorb food nutrients well, which can cause weight loss and decreased appetite. (2ndchance.info)
It includes energy needed to obtain, digest, and absorb food in amounts to maintain body weight, as well as energy for spontaneous activity. (merckvetmanual.com)